<https://psmicrographs.com/sems/technology/twenty-pound-note-in-visible-and-infrared-light/>
<http://schema.org/description>
"Comparison of a British twenty pound note as illuminated by visible light (uppermost) and near infrared at >820nm"
<https://psmicrographs.com/sems/technology/twenty-pound-note-in-visible-and-infrared-light/>